I am using the Flash Event Calendar at http://www.cupwedm.net/.
After an initial conflict with relatively-positioned DIVs, I got it working, as you can see.

But I still have a couple of problems.
1. The event descriptions seem to have an error in the line feeds. If you will click on the February 6 event, you will see that a single line feed in the description becomes a triple line feed. The two lines are in fact sequential, with nothing in between, but as you will see they have two empty lines between them. Also, it would be nice to be able to alter the font size of the description, but there seems no way of doing that in the options interface.
2. My client's contact person has a very strict security setup on her computer, which seems to restrict the display of Flash elements. She can't even download the plug-in, so she can't see the flash calendar. I appreciate, though, that this ain't your fault: if her IT security manager won't let her use Flash then she can't use Flash. I hadn't known that. If she can't use Flash, then there will be a number of other officers who can't use it.

In light of the above, I wonder if I could get a free or discounted copy of the PHP Event Calendar . . . .